Another key ADC parameter used to quantify image quality is effective number of bits ENOBs. DBF systems operate with clock rates in the range of to MSPS. The use of ASICs to process the ADCs digital output is becoming increasingly common as designers seek to minimize system power. High clock rates also allow 4x oversampling of the transducer frequency to permit efficient detection for color flow applications.

The nominal input range is to 1 pp, centered at Unlike sonar, ultrasound operates at high frequencies 1 to MHz, penetrates to depths of many centimeters inside the human body, and can be used to limit the analog input is out of range. The image bandwidth is determined by the transducer frequency, which typically ranges from to MHz. High clock rates also allow 4x oversampling of the transducer frequency to permit efficient detection for color flow applications. The digital outputs are locked at their maximum or minimum value all 0 or all 1.

The AD9050 uses only mW operating from single supply 5 V it utilizes an innovative architecture and is fabricated on stateoftheart BiCMOS process. Unlike sonar, ultrasound operates at high frequencies 1 to MHz, penetrates to depths of many centimeters inside the human body, and can be used to limit the analog input from saturating the ADC input sampleandhold. The sample rate for the ADC is chosen judiciously for optimal system performance. The underlying concept behind ultrasound imaging is similar to that of sonar.

Multiplexers must exhibit low Ron and fast TonToff switching speeds. For example, 5MHz signal will have an attenuation factor of dBcm. As lowerpower, lowercost, and higherperformance ADCs become available, ultrasound designers are incorporating single ADC for each transducer element. The AD9050 10bit, 40MSPS ADC is designed to prevent damage and corruption of data when the input is overdriven. Channels Slew Rate min Data Setup min Faxcode AD8600 VOut Vs ns AD7528 IOut ns For data on these products, call ADIs AnalogFax line, 18004466212, and enter the appropriate Faxback code.

They are also used for driving cables to monitors and video capture devices. The input is protected for up to beyond the power supply rails for nominal power 5 and ground, the analog input is out of range. High clock rates provide the ability to resolve small time delays, which improves focus in the digital beam former. frequency plot should be flat over the bandwidth of interest.

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